Hep-Th, or high-energy theoretical physics, explores the fundamental building blocks of our universe and the forces that govern them. Researchers in this field use complex mathematics to understand everything from subatomic particles to the behavior of black holes, often pushing the boundaries of what we know about space and time.

At Gist.Science, we monitor the arXiv repository to ensure you stay ahead of the curve in this rapidly evolving discipline. For every new preprint uploaded to arXiv under this category, our team generates both accessible plain-language overviews and detailed technical summaries, making cutting-edge research understandable regardless of your background.

Below are the latest papers in high-energy theoretical physics, curated to help you navigate the most significant recent discoveries.

⚛️ high-energy theory

A Surface Integrand for the Inverse KLT Kernel

This paper proposes a loop-level generalization of the inverse KLT kernel as a planar integrand defined by a Berends-Giele-like recursion, demonstrating its structural equivalence to cubic scalar theory integrands and its ability to unify cubic scalar and non-linear sigma model scattering through kinematic α\alpha'-shifts on the kinematic surface.

Christoph Bartsch, Karol Kampf, Jiří Novotný, Jaroslav Trnka2026-02-18
⚛️ high-energy theory

Learning the S-matrix from data: Rediscovering gravity from gauge theory via symbolic regression

This paper demonstrates that symbolic regression applied to numerical on-shell data can autonomously rediscover fundamental analytic structures in scattering amplitudes, including KLT, Kleiss-Kuijf, and BCJ relations, thereby establishing a data-driven strategy for uncovering hidden theoretical connections like the gravity-gauge duality without relying on prior group-theoretic knowledge.

Nathan Moynihan2026-02-18
⚛️ general relativity

Cosmic topology. Part IIc. Detectability with non-standard primordial power spectrum

This study demonstrates that deviations from the standard primordial power spectrum can significantly enhance or suppress the detectability of non-trivial cosmic topologies in CMB temperature data, highlighting the critical need to account for primordial spectrum uncertainties in topology searches.

Joline Noltmann, Andrius Tamosiunas, Deyan P. Mihaylov, Yashar Akrami, Javier Carrón Duque, Thiago S. Pereira, Glenn D. (…)2026-02-18
⚛️ nuclear theory

Semi-Classical Spin Hydrodynamics in Flat and Curved Spacetime: Covariance, Linear Waves, and Bjorken Background

This paper establishes a covariant framework for semi-classical spin hydrodynamics in flat and curved spacetimes, demonstrating that spin and fluid modes decouple in the linear regime with damping governed solely by spin relaxation coefficients, while also highlighting the limitations of the Gibbs stability criterion due to equilibrium anisotropy and confirming similar relaxation dynamics in a conformal Bjorken flow background.

Annamaria Chiarini, Julia Sammet, Masoud Shokri2026-02-17
⚛️ high-energy theory

Dynamical Phases of Higher Dimensional Floquet CFTs

This paper extends the study of Floquet Conformal Field Theories to higher dimensions by utilizing quaternionic representations to classify dynamical phases in multi-step drive protocols, revealing a fundamental geometric correspondence where heating, critical, and non-heating regimes map to the presence or absence of non-extremal and extremal Killing horizons in the system's base and dual AdS spaces.

Diptarka Das, Sumit R. Das, Arnab Kundu, Krishnendu Sengupta2026-02-17